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实验测定了航空用有机玻璃T=-40～40℃,ε_t=1.0×10~(-4)～1.0×10~(-1)s~(-1)范围内单轴压缩循环的应力-应变曲线。提出一种考虑温度和应变率效应的非线性粘弹性变形和塑性变形相耦合的本构关系,给出了完备的微分和积分形式的关系方程组,用于拟合各不同温度和应变率的实测曲线,获得了良好吻合的结果。
The stress-strain of uniaxial compression cycle in aviation plexiglass T = -40 ~ 40 ℃ and ε_t = 1.0 × 10 -4 ~ 1.0 × 10 -1 s -1 were measured experimentally. curve. A constitutive relation between nonlinear viscoelastic deformation and plastic deformation considering the effects of temperature and strain rate is presented. A complete set of equations for differential and integral forms is given for fitting the equations of different temperatures and strain rates The measured curve, obtained a good match results.